[132861] in North American Network Operators' Group
Re: Want to move to all 208V for server racks
daemon@ATHENA.MIT.EDU (Ingo Flaschberger)
Thu Dec 2 12:02:17 2010
Date: Thu, 2 Dec 2010 17:52:30 +0100 (CET)
From: Ingo Flaschberger <if@xip.at>
To: Jay Nakamura <zeusdadog@gmail.com>
In-Reply-To: <AANLkTikWUx4V=6vxsCEx8i0T8FE6UxWNpazqXUeNkT+5@mail.gmail.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Dear Jay,
>> you mean 240V AC 50HZ and move from 120V 60Hz? (or also 50Hz)
>
> In US, I think everything is 60Hz. But I mean 208v single phase.
> (Which is what you get when you combine two 120v single phase legs out
> of three phase, I believe. I am not an expert on AC...)
I got the point.
120 * sqrt(3), phase to phase, three-phase current in european;
>> you will need to check each device if it supports 240V, commonly the
>> specified power ratings are printed at a stricker on the device itself.
>
> I have even been looking at USB HD AC adapter and all other odd ball
> equipment and I always see the label say "100~240v AC". Dell's old
> rack mount monitor/KB from 5 years ago even supports 208v (Just wrong
> connector.)
Whats the idea behind todo this?
You will also need circuit breakers that both phases are switched of
simultaneous?
Kind regards,
Ingo Flaschberger
